For a bake sale, jeremy is selling cookies for $3.00 a dozen (25 cents for each single cookie). if jeremy makes $25.75 during the bake sale, how many cookies did he sell?

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?

Which of the following is not a subset of {1,2,3}?